/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:07:29,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:07:29,348 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:07:29,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:07:29,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:07:29,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:07:29,354 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:07:29,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:07:29,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:07:29,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:07:29,373 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:07:29,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:07:29,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:07:29,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:07:29,375 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:07:29,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:07:29,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:07:29,376 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:07:29,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:07:29,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:07:29,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:07:29,377 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:07:29,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:07:29,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:07:29,378 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:07:29,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:07:29,379 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:07:29,379 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:07:29,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:07:29,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:07:29,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:07:29,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:07:29,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:07:29,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:07:29,382 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:07:29,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:07:29,382 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:07:29,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:07:29,383 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:07:29,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:07:29,383 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:07:29,385 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:07:29,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:07:29,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:07:29,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:07:29,634 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:07:29,634 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:07:29,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c [2023-08-04 02:07:30,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:07:30,998 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:07:30,998 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c [2023-08-04 02:07:31,005 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23939615/5358258b50ee4fde9cf65c68b529b42b/FLAG878751525 [2023-08-04 02:07:31,016 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a23939615/5358258b50ee4fde9cf65c68b529b42b [2023-08-04 02:07:31,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:07:31,019 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:07:31,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:07:31,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:07:31,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:07:31,027 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,028 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188aa844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31, skipping insertion in model container [2023-08-04 02:07:31,028 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,050 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:07:31,233 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c[3467,3480] [2023-08-04 02:07:31,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:07:31,258 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:07:31,293 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-node-symm.wvr_bound2.c[3467,3480] [2023-08-04 02:07:31,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:07:31,323 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:07:31,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31 WrapperNode [2023-08-04 02:07:31,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:07:31,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:07:31,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:07:31,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:07:31,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,391 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 326 [2023-08-04 02:07:31,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:07:31,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:07:31,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:07:31,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:07:31,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,411 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,417 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:07:31,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:07:31,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:07:31,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:07:31,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (1/1) ... [2023-08-04 02:07:31,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:07:31,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:07:31,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:07:31,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:07:31,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:07:31,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:07:31,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:07:31,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:07:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:07:31,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:07:31,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:07:31,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:07:31,506 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:07:31,635 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:07:31,637 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:07:32,105 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:07:32,113 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:07:32,114 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 02:07:32,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:07:32 BoogieIcfgContainer [2023-08-04 02:07:32,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:07:32,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:07:32,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:07:32,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:07:32,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:07:31" (1/3) ... [2023-08-04 02:07:32,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c0b002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:07:32, skipping insertion in model container [2023-08-04 02:07:32,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:07:31" (2/3) ... [2023-08-04 02:07:32,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c0b002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:07:32, skipping insertion in model container [2023-08-04 02:07:32,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:07:32" (3/3) ... [2023-08-04 02:07:32,123 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-node-symm.wvr_bound2.c [2023-08-04 02:07:32,129 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:07:32,137 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:07:32,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:07:32,138 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:07:32,247 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 02:07:32,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,461 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 02:07:32,461 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:07:32,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 02:07:32,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:07:32,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,501 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 373 transitions, 768 flow [2023-08-04 02:07:32,597 INFO L124 PetriNetUnfolderBase]: 57/551 cut-off events. [2023-08-04 02:07:32,597 INFO L125 PetriNetUnfolderBase]: For 8/14 co-relation queries the response was YES. [2023-08-04 02:07:32,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 551 events. 57/551 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1708 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 360. Up to 8 conditions per place. [2023-08-04 02:07:32,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 15168 [2023-08-04 02:07:44,090 INFO L134 LiptonReduction]: Checked pairs total: 24013 [2023-08-04 02:07:44,093 INFO L136 LiptonReduction]: Total number of compositions: 417 [2023-08-04 02:07:44,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:07:44,119 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4789f8b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:07:44,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:07:44,130 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:07:44,131 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2023-08-04 02:07:44,131 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:07:44,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:44,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:44,132 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:44,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 674352049, now seen corresponding path program 1 times [2023-08-04 02:07:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:44,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603765468] [2023-08-04 02:07:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:44,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:07:44,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:44,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603765468] [2023-08-04 02:07:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603765468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:44,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:07:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801773266] [2023-08-04 02:07:44,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:44,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:44,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:44,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:44,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 790 [2023-08-04 02:07:44,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:44,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:44,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 790 [2023-08-04 02:07:44,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:44,945 INFO L124 PetriNetUnfolderBase]: 1320/2065 cut-off events. [2023-08-04 02:07:44,945 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-04 02:07:44,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4156 conditions, 2065 events. 1320/2065 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9090 event pairs, 980 based on Foata normal form. 0/1509 useless extension candidates. Maximal degree in co-relation 3696. Up to 2024 conditions per place. [2023-08-04 02:07:44,954 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 33 selfloop transitions, 2 changer transitions 13/50 dead transitions. [2023-08-04 02:07:44,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 214 flow [2023-08-04 02:07:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:07:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:07:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1038 transitions. [2023-08-04 02:07:44,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379746835443038 [2023-08-04 02:07:44,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1038 transitions. [2023-08-04 02:07:44,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1038 transitions. [2023-08-04 02:07:44,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:44,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1038 transitions. [2023-08-04 02:07:44,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 346.0) internal successors, (1038), 3 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:44,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 790.0) internal successors, (3160), 4 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,003 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 122 flow. Second operand 3 states and 1038 transitions. [2023-08-04 02:07:45,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 214 flow [2023-08-04 02:07:45,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:07:45,012 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 94 flow [2023-08-04 02:07:45,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-04 02:07:45,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2023-08-04 02:07:45,017 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 94 flow [2023-08-04 02:07:45,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:45,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:45,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:07:45,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:45,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1395417726, now seen corresponding path program 1 times [2023-08-04 02:07:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:45,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184931751] [2023-08-04 02:07:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:07:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184931751] [2023-08-04 02:07:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184931751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:45,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:45,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704170513] [2023-08-04 02:07:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:45,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 02:07:45,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:45,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 02:07:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:45,458 INFO L124 PetriNetUnfolderBase]: 438/711 cut-off events. [2023-08-04 02:07:45,459 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 02:07:45,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 711 events. 438/711 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2543 event pairs, 322 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1440. Up to 703 conditions per place. [2023-08-04 02:07:45,462 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-04 02:07:45,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 168 flow [2023-08-04 02:07:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1364 transitions. [2023-08-04 02:07:45,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316455696202532 [2023-08-04 02:07:45,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:45,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,478 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,478 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 94 flow. Second operand 4 states and 1364 transitions. [2023-08-04 02:07:45,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 168 flow [2023-08-04 02:07:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 164 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 02:07:45,480 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 104 flow [2023-08-04 02:07:45,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-04 02:07:45,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2023-08-04 02:07:45,481 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 104 flow [2023-08-04 02:07:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.25) internal successors, (1337), 4 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:45,482 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:07:45,482 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:45,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1849759962, now seen corresponding path program 1 times [2023-08-04 02:07:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:45,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598627258] [2023-08-04 02:07:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:07:45,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:45,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598627258] [2023-08-04 02:07:45,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598627258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:45,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:45,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184847506] [2023-08-04 02:07:45,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:45,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:45,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 02:07:45,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:45,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 02:07:45,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:45,765 INFO L124 PetriNetUnfolderBase]: 438/712 cut-off events. [2023-08-04 02:07:45,765 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 02:07:45,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 712 events. 438/712 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2537 event pairs, 322 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 1440. Up to 704 conditions per place. [2023-08-04 02:07:45,769 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 34 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-04 02:07:45,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 180 flow [2023-08-04 02:07:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1364 transitions. [2023-08-04 02:07:45,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316455696202532 [2023-08-04 02:07:45,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:45,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1364 transitions. [2023-08-04 02:07:45,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,784 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 104 flow. Second operand 4 states and 1364 transitions. [2023-08-04 02:07:45,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 180 flow [2023-08-04 02:07:45,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 174 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:45,785 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 112 flow [2023-08-04 02:07:45,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-04 02:07:45,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2023-08-04 02:07:45,786 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 112 flow [2023-08-04 02:07:45,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.5) internal successors, (1338), 4 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:45,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:07:45,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:45,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1729053702, now seen corresponding path program 1 times [2023-08-04 02:07:45,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:45,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387965981] [2023-08-04 02:07:45,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:45,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:07:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387965981] [2023-08-04 02:07:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387965981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:45,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:07:45,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334721533] [2023-08-04 02:07:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:07:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:07:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:07:45,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 790 [2023-08-04 02:07:45,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 334.75) internal successors, (1339), 4 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:45,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:45,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 790 [2023-08-04 02:07:45,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:07:46,045 INFO L124 PetriNetUnfolderBase]: 438/713 cut-off events. [2023-08-04 02:07:46,045 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 02:07:46,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466 conditions, 713 events. 438/713 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2537 event pairs, 322 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 1445. Up to 705 conditions per place. [2023-08-04 02:07:46,049 INFO L140 encePairwiseOnDemand]: 786/790 looper letters, 35 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-04 02:07:46,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 190 flow [2023-08-04 02:07:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:07:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:07:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1364 transitions. [2023-08-04 02:07:46,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316455696202532 [2023-08-04 02:07:46,053 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1364 transitions. [2023-08-04 02:07:46,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1364 transitions. [2023-08-04 02:07:46,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:07:46,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1364 transitions. [2023-08-04 02:07:46,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:46,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:46,062 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 790.0) internal successors, (3950), 5 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:46,062 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 112 flow. Second operand 4 states and 1364 transitions. [2023-08-04 02:07:46,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 190 flow [2023-08-04 02:07:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 184 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:07:46,064 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 120 flow [2023-08-04 02:07:46,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=790, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-04 02:07:46,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2023-08-04 02:07:46,065 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 120 flow [2023-08-04 02:07:46,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 334.75) internal successors, (1339), 4 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:46,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:46,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:46,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:07:46,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:46,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:46,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1397886434, now seen corresponding path program 1 times [2023-08-04 02:07:46,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:46,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663431592] [2023-08-04 02:07:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:07:46,102 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:07:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:07:46,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:07:46,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:07:46,154 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 02:07:46,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 02:07:46,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 02:07:46,156 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 02:07:46,157 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 02:07:46,158 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:07:46,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:07:46,216 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 02:07:46,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,469 INFO L124 PetriNetUnfolderBase]: 168/1316 cut-off events. [2023-08-04 02:07:46,470 INFO L125 PetriNetUnfolderBase]: For 72/103 co-relation queries the response was YES. [2023-08-04 02:07:46,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1316 events. 168/1316 cut-off events. For 72/103 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7133 event pairs, 1 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 860. Up to 32 conditions per place. [2023-08-04 02:07:46,491 INFO L82 GeneralOperation]: Start removeDead. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:07:46,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 436 places, 475 transitions, 998 flow [2023-08-04 02:07:46,737 INFO L124 PetriNetUnfolderBase]: 168/1316 cut-off events. [2023-08-04 02:07:46,737 INFO L125 PetriNetUnfolderBase]: For 72/103 co-relation queries the response was YES. [2023-08-04 02:07:46,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1413 conditions, 1316 events. 168/1316 cut-off events. For 72/103 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7133 event pairs, 1 based on Foata normal form. 0/1141 useless extension candidates. Maximal degree in co-relation 860. Up to 32 conditions per place. [2023-08-04 02:07:46,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 50688 [2023-08-04 02:07:58,037 INFO L134 LiptonReduction]: Checked pairs total: 107451 [2023-08-04 02:07:58,038 INFO L136 LiptonReduction]: Total number of compositions: 509 [2023-08-04 02:07:58,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:07:58,040 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4789f8b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:07:58,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 02:07:58,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:07:58,048 INFO L124 PetriNetUnfolderBase]: 10/93 cut-off events. [2023-08-04 02:07:58,048 INFO L125 PetriNetUnfolderBase]: For 9/13 co-relation queries the response was YES. [2023-08-04 02:07:58,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:07:58,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:07:58,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:07:58,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:07:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash 450313315, now seen corresponding path program 1 times [2023-08-04 02:07:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:07:58,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129917038] [2023-08-04 02:07:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:07:58,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:07:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:07:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:07:58,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:07:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129917038] [2023-08-04 02:07:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129917038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:07:58,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:07:58,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:07:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243087979] [2023-08-04 02:07:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:07:58,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:07:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:07:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:07:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:07:58,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 984 [2023-08-04 02:07:58,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 90 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 429.0) internal successors, (1287), 3 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:07:58,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:07:58,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 984 [2023-08-04 02:07:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:25,544 INFO L124 PetriNetUnfolderBase]: 324725/415153 cut-off events. [2023-08-04 02:08:25,544 INFO L125 PetriNetUnfolderBase]: For 17426/17426 co-relation queries the response was YES. [2023-08-04 02:08:26,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832507 conditions, 415153 events. 324725/415153 cut-off events. For 17426/17426 co-relation queries the response was YES. Maximal size of possible extension queue 9362. Compared 2618947 event pairs, 253361 based on Foata normal form. 0/320513 useless extension candidates. Maximal degree in co-relation 595757. Up to 406632 conditions per place. [2023-08-04 02:08:27,071 INFO L140 encePairwiseOnDemand]: 978/984 looper letters, 57 selfloop transitions, 2 changer transitions 17/88 dead transitions. [2023-08-04 02:08:27,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 88 transitions, 372 flow [2023-08-04 02:08:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:08:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:08:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1356 transitions. [2023-08-04 02:08:27,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2023-08-04 02:08:27,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1356 transitions. [2023-08-04 02:08:27,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1356 transitions. [2023-08-04 02:08:27,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:27,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1356 transitions. [2023-08-04 02:08:27,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 452.0) internal successors, (1356), 3 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:27,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 984.0) internal successors, (3936), 4 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:27,084 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 984.0) internal successors, (3936), 4 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:27,084 INFO L175 Difference]: Start difference. First operand has 77 places, 90 transitions, 228 flow. Second operand 3 states and 1356 transitions. [2023-08-04 02:08:27,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 88 transitions, 372 flow [2023-08-04 02:08:27,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 88 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:08:27,285 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 176 flow [2023-08-04 02:08:27,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=984, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-08-04 02:08:27,286 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2023-08-04 02:08:27,286 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 176 flow [2023-08-04 02:08:27,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 429.0) internal successors, (1287), 3 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:27,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:27,287 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:27,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:08:27,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:27,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -465191578, now seen corresponding path program 1 times [2023-08-04 02:08:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776282217] [2023-08-04 02:08:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 02:08:27,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:27,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776282217] [2023-08-04 02:08:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776282217] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:27,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:08:27,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:08:27,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166516000] [2023-08-04 02:08:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:27,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:08:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:08:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:08:27,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 984 [2023-08-04 02:08:27,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 426.5) internal successors, (1706), 4 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:27,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:27,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 984 [2023-08-04 02:08:27,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:34,866 INFO L124 PetriNetUnfolderBase]: 96764/122427 cut-off events. [2023-08-04 02:08:34,866 INFO L125 PetriNetUnfolderBase]: For 2554/2554 co-relation queries the response was YES. [2023-08-04 02:08:35,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246950 conditions, 122427 events. 96764/122427 cut-off events. For 2554/2554 co-relation queries the response was YES. Maximal size of possible extension queue 3096. Compared 676014 event pairs, 75936 based on Foata normal form. 0/101104 useless extension candidates. Maximal degree in co-relation 246935. Up to 121792 conditions per place. [2023-08-04 02:08:35,510 INFO L140 encePairwiseOnDemand]: 979/984 looper letters, 56 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-08-04 02:08:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 298 flow [2023-08-04 02:08:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:08:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:08:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1757 transitions. [2023-08-04 02:08:35,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44639227642276424 [2023-08-04 02:08:35,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1757 transitions. [2023-08-04 02:08:35,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1757 transitions. [2023-08-04 02:08:35,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:35,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1757 transitions. [2023-08-04 02:08:35,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 439.25) internal successors, (1757), 4 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:35,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:35,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:35,526 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 176 flow. Second operand 4 states and 1757 transitions. [2023-08-04 02:08:35,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 298 flow [2023-08-04 02:08:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 290 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 02:08:35,531 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 186 flow [2023-08-04 02:08:35,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=984, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-04 02:08:35,532 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2023-08-04 02:08:35,532 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 186 flow [2023-08-04 02:08:35,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 426.5) internal successors, (1706), 4 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:35,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:35,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:35,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 02:08:35,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:35,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1451115375, now seen corresponding path program 1 times [2023-08-04 02:08:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:35,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62424600] [2023-08-04 02:08:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 02:08:35,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:35,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62424600] [2023-08-04 02:08:35,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62424600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:35,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:08:35,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:08:35,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236483355] [2023-08-04 02:08:35,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:35,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:08:35,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:35,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:08:35,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:08:35,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 984 [2023-08-04 02:08:35,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 426.75) internal successors, (1707), 4 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:35,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:35,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 984 [2023-08-04 02:08:35,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:43,079 INFO L124 PetriNetUnfolderBase]: 96764/122428 cut-off events. [2023-08-04 02:08:43,080 INFO L125 PetriNetUnfolderBase]: For 2530/2530 co-relation queries the response was YES. [2023-08-04 02:08:43,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246935 conditions, 122428 events. 96764/122428 cut-off events. For 2530/2530 co-relation queries the response was YES. Maximal size of possible extension queue 3096. Compared 676248 event pairs, 75936 based on Foata normal form. 0/101106 useless extension candidates. Maximal degree in co-relation 246911. Up to 121794 conditions per place. [2023-08-04 02:08:43,752 INFO L140 encePairwiseOnDemand]: 980/984 looper letters, 58 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-04 02:08:43,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 310 flow [2023-08-04 02:08:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:08:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:08:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1756 transitions. [2023-08-04 02:08:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44613821138211385 [2023-08-04 02:08:43,756 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1756 transitions. [2023-08-04 02:08:43,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1756 transitions. [2023-08-04 02:08:43,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:43,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1756 transitions. [2023-08-04 02:08:43,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:43,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:43,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:43,767 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 186 flow. Second operand 4 states and 1756 transitions. [2023-08-04 02:08:43,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 310 flow [2023-08-04 02:08:43,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 73 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:08:43,770 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 199 flow [2023-08-04 02:08:43,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=984, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-08-04 02:08:43,771 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, -1 predicate places. [2023-08-04 02:08:43,771 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 199 flow [2023-08-04 02:08:43,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 426.75) internal successors, (1707), 4 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:43,772 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:43,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 02:08:43,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:43,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 920701121, now seen corresponding path program 1 times [2023-08-04 02:08:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:43,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338501169] [2023-08-04 02:08:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:08:43,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:43,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338501169] [2023-08-04 02:08:43,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338501169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:43,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:08:43,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:08:43,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153444883] [2023-08-04 02:08:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:43,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:08:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:08:43,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:08:43,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 424 out of 984 [2023-08-04 02:08:43,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:43,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:43,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 424 of 984 [2023-08-04 02:08:43,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:08:50,609 INFO L124 PetriNetUnfolderBase]: 96764/122429 cut-off events. [2023-08-04 02:08:50,610 INFO L125 PetriNetUnfolderBase]: For 2531/2531 co-relation queries the response was YES. [2023-08-04 02:08:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246944 conditions, 122429 events. 96764/122429 cut-off events. For 2531/2531 co-relation queries the response was YES. Maximal size of possible extension queue 3096. Compared 676483 event pairs, 75936 based on Foata normal form. 0/101108 useless extension candidates. Maximal degree in co-relation 246918. Up to 121795 conditions per place. [2023-08-04 02:08:51,602 INFO L140 encePairwiseOnDemand]: 980/984 looper letters, 59 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-04 02:08:51,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 325 flow [2023-08-04 02:08:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:08:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:08:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1756 transitions. [2023-08-04 02:08:51,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44613821138211385 [2023-08-04 02:08:51,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1756 transitions. [2023-08-04 02:08:51,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1756 transitions. [2023-08-04 02:08:51,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:08:51,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1756 transitions. [2023-08-04 02:08:51,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 439.0) internal successors, (1756), 4 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:51,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:51,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 984.0) internal successors, (4920), 5 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:51,618 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 199 flow. Second operand 4 states and 1756 transitions. [2023-08-04 02:08:51,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 325 flow [2023-08-04 02:08:51,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 319 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:08:51,622 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 207 flow [2023-08-04 02:08:51,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=984, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-08-04 02:08:51,623 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2023-08-04 02:08:51,623 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 207 flow [2023-08-04 02:08:51,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:51,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:08:51,624 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:08:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:08:51,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 02:08:51,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:08:51,624 INFO L85 PathProgramCache]: Analyzing trace with hash 79847776, now seen corresponding path program 1 times [2023-08-04 02:08:51,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:08:51,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114632481] [2023-08-04 02:08:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:51,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:08:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:08:51,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:08:51,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114632481] [2023-08-04 02:08:51,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114632481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:08:51,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044463563] [2023-08-04 02:08:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:08:51,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:08:51,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:08:51,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:08:51,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:08:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:08:51,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:08:51,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:08:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:08:51,947 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:08:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044463563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:08:51,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:08:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:08:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701989606] [2023-08-04 02:08:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:08:51,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:08:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:08:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:08:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:08:51,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 984 [2023-08-04 02:08:51,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 432.2) internal successors, (2161), 5 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:08:51,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:08:51,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 984 [2023-08-04 02:08:51,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand